[IPython-dev] Two frontends, one kernel

MinRK benjaminrk at gmail.com
Thu May 1 16:01:59 EDT 2014


All of those DEALER sockets should be ROUTER sockets. The DEALER behavior
is correct for only one peer, but it will round-robin replies if there is
more than one.  Clearly some documentation is wrong. Where did you get the
suggestion that they should be DEALER sockets?

-MinRK


On Thu, May 1, 2014 at 12:45 PM, Doug Blank <doug.blank at gmail.com> wrote:

> On Thu, May 1, 2014 at 2:37 PM, MinRK <benjaminrk at gmail.com> wrote:
>
>> What are your socket types on the Kernel side?
>>
>
> Here is the definitions for our channels:
>
>     public class ShellChannel : Channel {
>     base(session, auth, transport, address, port, SocketType.DEALER) {
>             }
>     }
> public class IOPubChannel : Channel {
>     base(session, auth, transport, address, port, SocketType.PUB) {
>             }
>     }
> public class ControlChannel : Channel {
>     base(session, auth, transport, address, port, SocketType.DEALER) {
>             }
>     }
> public class StdInChannel : Channel {
>     base(session, auth, transport, address, port, SocketType.DEALER) {
>             }
>     }
> public class HeartBeatChannel : Channel {
>      base(session, auth, transport, address, port, SocketType.REP) {
>             }
>     }
>
> Could that really effect multi-frontend, but not single?
>
> -Doug
>
>
>
>>
>>
>> On Thu, May 1, 2014 at 9:58 AM, Doug Blank <doug.blank at gmail.com> wrote:
>>
>>> Devs, I have been trying to find the cause of this bug for some time,
>>> and I thought that someone might be able to provide a hint as to where to
>>> look to find the issue.
>>>
>>> We have an external kernel that works very well when you connect onto it
>>> with a single frontend. But when you connect two frontends (console or
>>> notebook), then the conversation gets confused.
>>>
>>> More detail:
>>>
>>> Terminal 1:
>>>
>>> ipython console --profile calico
>>>
>>> works fine.
>>>
>>> Terminal 2:
>>>
>>> ipython console --profile calico --existing
>>>
>>> starts, but now things are confused. Now, each terminal takes turns
>>> being able to get the prompt. If run in notebook, then code execution never
>>> signals the end of computing (the [*] never turns to a number, but you can
>>> still enter and get results back). In the console, output is received, but
>>> the prompt is in the other terminal.
>>>
>>> It works fine with a single front end.
>>>
>>> Any ideas appreciated!
>>>
>>> -Doug
>>>
>>> _______________________________________________
>>> IPython-dev mailing list
>>> IPython-dev at scipy.org
>>> http://mail.scipy.org/mailman/listinfo/ipython-dev
>>>
>>>
>>
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>>
>
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